FRICTION
This physics simulation shows how unity can simulate friction as part of the Physics package:
https://kay6.itch.io/friction-demo
GRAVITY BOUNCES
Another simulation to illustrate gravity, friction, and bounciness:
https://kay6.itch.io/rigidbody-demo
Adapted by Kaymo © 2022
Credit: https://github.com/Unity-Technologies/PhysicsExamples2D/blob/master/License.txt *
(*) free and unencumbered software released into the public domain.